How to Choose the Package Type of a PIN Diode Switch
PIN Diode Switch Package Selection Guide
1. Frequency Range and Signal Integrity
- High-frequency (>10 GHz): SMT packages (SOT-343, SOT-143)
- Millimeter-wave: Chip-scale packages (CSPs) or flip-chip designs
2. Power Handling and Thermal Management
- High-power (>1 W): TO-220, TO-3, or QFN with thermal pads
- Low-power (<100 mW): SOT-23 plastic packages
3. Environmental and Mechanical
- Rugged: Hermetically sealed ceramic LCC
- Compact: Micro-SMT (SC-70, WLCSP)
4. Cost and Manufacturing
- Mass production: SMT for automated assembly
- Prototyping: Through-hole (TO-92)
5. Application-Specific
- 5G base stations: SOT-363 for RF performance
- Test equipment: BNC/coaxial connectors